define annular ring
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What is an Annular Ring? When traces on a circuit board need to connect to another layer, they typically end up on a pad and then through a via on that pad go to connect to another layer. An annular ring is the area on the pad that surrounds the via. An Annular Ring Width is the (diameter of the pad-diameter of the hole) / 2. (Tangency is the default option, and the DFM will check for 5 Mils minimum annular ring width). (NOTE: accepting Breakouts is typically NOT recommended!).
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Cold core ring Their size can range from 1 mm to over 10,000 km in diameter with depths over 5 km. Cold-core rings are the product of warm water currents wrapping around a colder water mass as it breaks away from its respective current. The direction an eddy swirls can be categorized as either cyclonic or anticyclonic depending on the hemisphere.
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Annular tear at the L4âL5 level Annular tear at the L4–L5 level. By Michael Perry, M.D. An annular tear at the L4–L5 vertebral level is an extremely common form of spinal degeneration. As the spine ages, the pressure of increased body weight and years of repetitive motions begin to wear down the components of the spine, placing pressure on the vertebrae and compressing the discs.
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Ring system There are three ways that planetary rings (the rings around planets) have been proposed to have formed: from material of the protoplanetary disk that was within the Roche limit of the planet and thus could not coalesce to form moons; from the debris of a moon that was disrupted by a large impact; or from the debris of a moon that was disrupted by ...
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- Configuration is the shape of single lesions and the arrangement of clusters of lesions. Linear lesions take on the shape of a straight line and are suggestive of some forms of contact dermatitis, linear epidermal nevi, and lichen striatus.Annular lesions are rings with central clearing.laques are palpable lesions 10 mm in diameter that are elevated or depressed compared to the skin surface. Plaques may be flat topped or rounded. Lesions of psoriasis and granuloma annulare commonly form plaques. Nodules are firm papules or lesions that extend into the dermis or subcutaneous tissue.
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Annulus of Zinn Annulus of Zinn Go to Academy Store Learn more and Purchase. The annulus of Zinn is the fibrous ring formed by the common origin of the 4 rectus muscles (Fig 1-5). The ring encircles the optic foramen and the central portion of the superior orbital fissure. The superior origin of the lateral rectus muscle separates the superior orbital fissure into 2 compartments.
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Concentric Circles more ... Two or more circles which have the same center point. The shape made by two different concentric circles is called an annulus. See: Annulus.
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buccal The form and development of the buccal pieces are also very various. The Ocean World: Louis Figuier On each side of the ring-plane four pairs of large irregular, annular holes; the fourth (inferior or buccal) pair is the longest.
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Altium Designer templates with Eurocircuits design rules. 1 The minimum annular ring rule “Minimum-IAR” is set to the IAR value of the Pattern class. 2  This value is larger than the OAR. 3  When “Top-Middle-Bottom” or “Full stack” is used it is possible to change the OAR to the (smaller) values of the Pattern Class.
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Restrictive Mitral Annuloplasty Does Not Limit Exercise Capacity Restrictive mitral annuloplasty with a rigid annuloplasty ring is the preferred treatment for secondary mitral regurgitation 1 and 2. A high recurrence rate of mitral regurgitation has led physicians to use smaller annuloplasty ring sizes [3] .t appears therefore that the small annuloplasty ring is, at the very least, not harmful. It seems that exercise performance by our patients might be limited by an array of other factors, including preexisting heart disease, which, in cases of functional mitral regurgitation, is primary to a valvular problem.
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annular annular. 1  having the form of a ring. ( 2 of a carpenter's nail) having a series of concentric grooves to improve holding power.
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Dictionary of Oil Industry Terminology n: the space around a pipe in a well bore, sometimes termed the annular space. The space around a pipe in a well bore, the outer wall of which may be the wall of either the bore hole or the casing; sometimes termed the annular space.†.
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- psoriasis circinata. medical dictionary. Psoriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. Synonyms: psoriasis annularis, psoriasis annulata, psoriasis orbicularis.soriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. Synonyms: psoriasis annularis, psoriasis annulata, psoriasis orbicularis.
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Ring Nebula For the Ring Nebula in Barnard's Galaxy, see Ring Nebula (NGC 6822).
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- annular (not comparable) 1  Pertaining to, or having the form of, a ring; ring-shaped; in the shape of an annulus. 2  Banded or marked with circles.
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- late 14c., in reference to ancient Rome, from Latin circus ring, circular line, which was applied by Romans to circular arenas for performances and contests and oval courses for racing (especially the Circus Maximus), from or cognate with Greek kirkos a circle, a ring, from PIE *kirk-from root *(s)ker-to turn, bend (see ring (n.)).
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Electronic Engineering Dictionary Minimum Annular Ring. The minimum annular ring on a plated thur-hole is the minimum amount of copper (at the narrowest point) between the hole and the edge of the pad after plating of the finished hole. MIL-STD-275E and IPC class 3 calls for a minimum annular ring of 0.05mm (0.002) edge of hole to edge of pad.
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- The area of the annulus is the area of the ring-shaped space between the two circles that define it. In the figure above it is the number of gray square units it takes to fill the annulus. This area is the area of the entire disk, minus the area of the 'hole' in the middle. ( See Area of a Circle): Where:
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Annulus of Zinn Annulus of Zinn. The annulus of Zinn, also known as the annular tendon or common tendinous ring, is a ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit. It is the common origin of the four rectus muscles (extraocular muscles).
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Annular erythema Annular erythema. Introduction. Annular erythema is not a diagnostic term but rather a description of a spreading erythematous eruption with an annular (ring-shaped) appearance. If the expansion of the rash is not uniform it may become arciform (arc-like) or polycyclic (two or more connected rings).
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Learn About the Tuition and Fees Deduction Limits and Income Ranges for the Tuition and Fees Deduction. The maximum amount of the tuition and fees deduction you can claim is $4,000 per year. The deduction is further limited by the following income ranges: 1  $4,000 maximum for income up to $65,000 ($130,000 for joint filers);
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Ring system Ring system - Rings around exoplanets. 1  Because all giant planets of the Solar System have rings, the existence of exoplanets with rings is plausible.
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M57, NGC6720, Ring Nebula The Ring Nebula was the first planetary nebula discovered, so called because of its visual spherical appearance through telescopes in the past. It has a diameter a little under one light-year and is 3000 light-years from Earth (angular size 1.2 arc minutes).
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Definitions &Translations Boolean ring In mathematics, a Boolean ring R is a ring for which x² = x for all x in R; that is, R consists only of idempotent elements. A Boolean ring is essentially the same thing as a Boolean algebra, with ring multiplication corresponding to conjunction or meet ∧, and ring addition to exclusive disjunction or symmetric difference.
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annular Pertaining to, or having the form of, a ring; forming a ring; ringed; ring-shaped; as, annular fibers; in the shape of an annulus. Banded or marked with circles. Origin
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Differential Diagnosis of Annular Lesions Annular lesions are extremely common and striking in appearance but can also be misleading. The term “annular” stems from the Latin word “annulus,” meaning ringed. 1 The lesions appear as circular or ovoid macules or patches with an erythematous periphery and central clearing.he condition is considered benign and is characterized by smooth, skin-colored annular plaques and papules. 1 The lesions are usually found on the hands, feet, wrists and ankles but can potentially occur anywhere on the body.